Complete rebuild of a drowned phantom 1

So I recently bought a DJI phantom V1.0 I got it for $100 but they told me it didn't work. So when I got home I tested it out to see what was going on, and the calibration worked! the drone was also receiving data from the transmitter! And it was receiving data from the GPS, so that meant that the GPS module, the receiver, and what ever that little thing on the landing gear is called... WORKED! and I assumed the NAZA-M V2 also worked but when I decided to take it out and see if it would actually fly... the motors would not even start... nothing would happen. Confused I opened the Phantom and I saw some horrible stuff, all the ESC were completely rusted (really bad) and all the motors were also rusted and were extremely hard to spin. I am really worried about the NAZA-M V2 because a lot of the pins were also really rusty. So my plan is to replace all the ESC and all the motors and hopefully the NAZA-M V2 is still working fine. If it still doesn't work after that I will probably be selling some cheap motors and esc.
I will be posting a complete guide when I'm done for any one wondering how to do it.
estimated repair costs: $140.

By the way do any experienced Phantom owners know how to tel if the NAZA module works? because it wouldn't connect to my computer... but as I said it did process the GPS data, and the receiver's data and it correctly communicates with the LED and calibration worked.

Water crashes are the worst,
I just did a full rebuild of a phantom vision ( saltwater crash ) I tried to salvage stuff, but it was a complete loss! Every electronic was corroded and rusty, so I kept the shell, and all other plastic parts. I shopped around, and found a camera with no MAC address, for $80, then I bought the main circuit board, naza, receiver, and GPS from a member for $150, had about another $25 in ( screw kit ( 2 needed ), USB port ( this may be your problem? If everything is rusty, this port is too? ) anyhow, I also bought the cable set, my good friend ( Dirkclod ) donated a set of ESC's and motors, as he upgraded his and no longer needed them ( all for free )
So I built it, for like $240 or so ( but I had to buy that camera as well ) so not bad! I would recommend replacing all internals, water does a lot of damage, and you would not want to be up 100' and have something fail? I've seen naza flight controllers on eBay as low as $45 U.S. , just shop around, if you need any guidance please review my post in phantom vision complete rebuild from scratch! Good luck, keep us updated!

Thanks! I'll be looking into that, I'll try to keep the total cost under $250 because that would be a pretty good deal for 1 working P1, 1 controller, 2 batteries, 2 sets for rotors and other small accessories. But would cleaning the circuit board with alcohol work? If so then i'll do that!

Most of the circuits are pretty tough if soldered correctly, I found the CAPACITORS, to be the biggest problem, they are the larger black round tubular circuits, as they stand on 2 legs under them, these legs are made of crappy tin, once corroded, they bust off with the slightest touch, all 4 fell of on ESC's, just disassembling the bird, so I touched the one on the main board, same thing fell off! I'd be very cautious and scrutinize EVERYTHING!
Here is a pic of a capacitor:

Haha thanks I just tested the receiver and the GPS module and everything worked fine so I'm
basically sure that the NAZA is working fine as well, I just finished cleaning up the shell, as well as the pins on the NAZA and the receiver. I also ordered 2 cw motors 2 ccw motors and 2 green esc and 2 red esc and a new LED/USB module. for about $120 so I got a pretty good deal! here are some pictutes: